mirror of
https://github.com/nmap/nmap.git
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Added or enhanced support for the following data types:
SQLTEXT = 0x23 - text GUIDTYPE = 0x24 - uniqueidentifier NTEXTTYPE = 0x63 - unicode text (ntext) BITNTYPE = 0x68 - boolean DECIMALNTYPE = 0x6A - decimal NUMERICNTYPE = 0x6C - numeric FLTNTYPE = 0x6D - float/real/double MONEYNTYPE = 0x6E - money / smallmoeny BIGBINARYTYPE = 0xAD - binary BIGCHARTYPE = 0xAF - char SQLNCHAR = 0xEF - unicode char (nchar) Added detection and handling of null values when processing query responses from the server. Added DoneProc response token support Reordered ColumnData and ColumnInfo parsers by data type code to make updates easier.
This commit is contained in:
tomsellers
@@ -1,5 +1,9 @@
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# Nmap Changelog ($Id$); -*-text-*-
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o [NSE] Updated mssql.lua library to support additional data types, enchanced
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some of the existing data types, added the DoneProc response token, and
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reordered code for maintainability. [Tom Sellers]
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o [NSE] Added http-slowloris-check script which checks if the server is vulnerable
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to a Slowloris DoS attack in a safe way. [Aleksandar Nikolic]
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480
nselib/mssql.lua
480
nselib/mssql.lua
@@ -130,6 +130,11 @@ _ENV = stdnse.module("mssql", stdnse.seeall)
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-- * added support for integrated NTLMv1 authentication
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--
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-- (Patrik Karlsson, Chris Woodbury)
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-- Revised 08/19/2012 - v0.6 - added multiple data types
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-- * added detection and handling of null values when processing query responses from the server
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-- * added DoneProc response token support
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--
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-- (Tom Sellers)
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local HAVE_SSL, openssl = pcall(require, "openssl")
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@@ -684,20 +689,32 @@ TokenType =
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EnvironmentChange = 0xE3,
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NTLMSSP_CHALLENGE = 0xed,
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Done = 0xFD,
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DoneProc = 0xFE,
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DoneInProc = 0xFF,
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}
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-- SQL Server/Sybase data types
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DataTypes =
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{
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SQLTEXT = 0x23,
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GUIDTYPE = 0x24,
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SYBINTN = 0x26,
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SYBINT2 = 0x34,
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SYBINT4 = 0x38,
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SYBDATETIME = 0x3D,
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NTEXTTYPE = 0x63,
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BITNTYPE = 0x68,
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DECIMALNTYPE = 0x6A,
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NUMERICNTYPE = 0x6C,
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FLTNTYPE = 0x6D,
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MONEYNTYPE = 0x6E,
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SYBDATETIMN = 0x6F,
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XSYBVARBINARY = 0xA5,
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XSYBVARCHAR = 0xA7,
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BIGBINARYTYPE = 0xAD,
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BIGCHARTYPE = 0xAF,
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XSYBNVARCHAR = 0xE7,
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SQLNCHAR = 0xEF,
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}
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-- SQL Server login error codes
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@@ -728,20 +745,25 @@ ColumnInfo =
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Parse =
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{
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[DataTypes.XSYBNVARCHAR] = function( data, pos )
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[DataTypes.SQLTEXT] = function( data, pos )
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local colinfo = {}
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local tmp
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pos, colinfo.lts, colinfo.codepage, colinfo.flags, colinfo.charset,
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colinfo.msglen = bin.unpack("<SSSCC", data, pos )
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pos, colinfo.unknown, colinfo.codepage, colinfo.flags, colinfo.charset = bin.unpack("<ISSC", data, pos )
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pos, colinfo.tablenamelen = bin.unpack("s", data, pos )
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pos, colinfo.tablename = bin.unpack("A" .. (colinfo.tablenamelen * 2), data, pos)
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pos, colinfo.msglen = bin.unpack("<C", data, pos )
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pos, tmp = bin.unpack("A" .. (colinfo.msglen * 2), data, pos)
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colinfo.text = Util.FromWideChar(tmp)
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return pos, colinfo
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end,
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[DataTypes.SYBINT2] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBDATETIME](data, pos)
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[DataTypes.GUIDTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBINTN](data, pos)
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end,
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[DataTypes.SYBINTN] = function( data, pos )
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@@ -755,19 +777,12 @@ ColumnInfo =
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return pos, colinfo
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end,
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[DataTypes.SYBINT4] = function( data, pos )
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[DataTypes.SYBINT2] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBDATETIME](data, pos)
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end,
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[DataTypes.XSYBVARBINARY] = function( data, pos )
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local colinfo = {}
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local tmp
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pos, colinfo.lts, colinfo.msglen = bin.unpack("<SC", data, pos)
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pos, tmp = bin.unpack("A" .. (colinfo.msglen * 2), data, pos )
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colinfo.text = Util.FromWideChar(tmp)
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return pos, colinfo
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[DataTypes.SYBINT4] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBDATETIME](data, pos)
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end,
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[DataTypes.SYBDATETIME] = function( data, pos )
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@@ -781,14 +796,81 @@ ColumnInfo =
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return pos, colinfo
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end,
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[DataTypes.NTEXTTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SQLTEXT](data, pos)
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end,
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[DataTypes.BITNTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBINTN](data, pos)
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end,
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[DataTypes.DECIMALNTYPE] = function( data, pos )
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local colinfo = {}
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local tmp
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pos, colinfo.unknown, colinfo.precision, colinfo.scale = bin.unpack("<CCC", data, pos)
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pos, colinfo.msglen = bin.unpack("<C",data,pos)
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pos, tmp = bin.unpack("A" .. (colinfo.msglen * 2), data, pos )
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colinfo.text = Util.FromWideChar(tmp)
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return pos, colinfo
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end,
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[DataTypes.NUMERICNTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.DECIMALNTYPE](data, pos)
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end,
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[DataTypes.FLTNTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBINTN](data, pos)
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end,
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[DataTypes.MONEYNTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBINTN](data, pos)
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end,
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[DataTypes.SYBDATETIMN] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.SYBINTN](data, pos)
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end,
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[DataTypes.XSYBVARBINARY] = function( data, pos )
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local colinfo = {}
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local tmp
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pos, colinfo.lts, colinfo.msglen = bin.unpack("<SC", data, pos)
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pos, tmp = bin.unpack("A" .. (colinfo.msglen * 2), data, pos )
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colinfo.text = Util.FromWideChar(tmp)
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return pos, colinfo
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end,
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[DataTypes.XSYBVARCHAR] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.XSYBNVARCHAR](data, pos)
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end,
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[DataTypes.BIGBINARYTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.XSYBVARBINARY](data, pos)
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end,
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[DataTypes.BIGCHARTYPE] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.XSYBNVARCHAR](data, pos)
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end,
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[DataTypes.XSYBNVARCHAR] = function( data, pos )
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local colinfo = {}
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local tmp
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pos, colinfo.lts, colinfo.codepage, colinfo.flags, colinfo.charset,
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colinfo.msglen = bin.unpack("<SSSCC", data, pos )
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pos, tmp = bin.unpack("A" .. (colinfo.msglen * 2), data, pos)
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colinfo.text = Util.FromWideChar(tmp)
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return pos, colinfo
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end,
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[DataTypes.SQLNCHAR] = function( data, pos )
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return ColumnInfo.Parse[DataTypes.XSYBNVARCHAR](data, pos)
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end,
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}
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}
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@@ -798,38 +880,84 @@ ColumnData =
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{
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Parse = {
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[DataTypes.XSYBNVARCHAR] = function( data, pos )
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local size, coldata
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[DataTypes.SQLTEXT] = function( data, pos )
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local len, coldata
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pos, size = bin.unpack( "<S", data, pos )
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pos, coldata = bin.unpack( "A"..size, data, pos )
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-- The first len value is the size of the meta data block
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-- for non-null values this seems to be 0x10 / 16 bytes
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pos, len = bin.unpack( "<C", data, pos )
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return pos, Util.FromWideChar(coldata)
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end,
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if ( len == 0 ) then
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return pos, 'Null'
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end
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[DataTypes.XSYBVARCHAR] = function( data, pos )
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local size, coldata
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-- Skip over the text update time and date values, we don't need them
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-- We may come back add parsing for this information.
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pos = pos + len
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pos, size = bin.unpack( "<S", data, pos )
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pos, coldata = bin.unpack( "A"..size, data, pos )
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-- skip a label, should be 'dummyTS'
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pos = pos + 8
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-- extract the actual data
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pos, len = bin.unpack( "<I", data, pos )
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pos, coldata = bin.unpack( "A"..len, data, pos )
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return pos, coldata
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end,
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[DataTypes.XSYBVARBINARY] = function( data, pos )
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local coldata, size
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[DataTypes.GUIDTYPE] = function( data, pos )
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local len, coldata, index, nextdata
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local hex = {}
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pos, len = bin.unpack("C", data, pos)
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pos, size = bin.unpack( "<S", data, pos )
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pos, coldata = bin.unpack( "A"..size, data, pos )
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if ( len == 0 ) then
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return pos, 'Null'
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return pos, "0x" .. select(2, bin.unpack("H"..coldata:len(), coldata ) )
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elseif ( len == 16 ) then
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-- Return the first 8 bytes
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for index=1, 8 do
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pos, hex[index] = bin.unpack("H", data, pos)
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end
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-- reorder the bytes
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coldata = hex[4] .. hex[3] .. hex[2] .. hex[1]
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coldata = coldata .. '-' .. hex[6] .. hex[5]
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coldata = coldata .. '-' .. hex[8] .. hex[7]
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pos, nextdata = bin.unpack("H2", data, pos)
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coldata = coldata .. '-' .. nextdata
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pos, nextdata = bin.unpack("H6", data, pos)
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coldata = coldata .. '-' .. nextdata
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else
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stdnse.print_debug("Unhandled length (%d) for GUIDTYPE", len)
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return pos + len, 'Unsupported Data'
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end
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return pos, coldata
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end,
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[DataTypes.SYBINT4] = function( data, pos )
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local num
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pos, num = bin.unpack("<I", data, pos)
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[DataTypes.SYBINTN] = function( data, pos )
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local len, num
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pos, len = bin.unpack("C", data, pos)
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return pos, num
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if ( len == 0 ) then
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return pos, 'Null'
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elseif ( len == 1 ) then
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return bin.unpack("C", data, pos)
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elseif ( len == 2 ) then
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return bin.unpack("<s", data, pos)
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elseif ( len == 4 ) then
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return bin.unpack("<i", data, pos)
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elseif ( len == 8 ) then
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return bin.unpack("<l", data, pos)
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else
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return -1, ("Unhandled length (%d) for SYBINTN"):format(len)
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end
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return -1, "Error"
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end,
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[DataTypes.SYBINT2] = function( data, pos )
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@@ -839,38 +967,264 @@ ColumnData =
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return pos, num
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end,
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[DataTypes.SYBINTN] = function( data, pos )
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local len, num
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[DataTypes.SYBINT4] = function( data, pos )
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local num
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pos, num = bin.unpack("<I", data, pos)
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return pos, num
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end,
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[DataTypes.SYBDATETIME] = function( data, pos )
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local hi, lo, result_seconds, result
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local tds_epoch, system_epoch, tds_offset_seconds
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pos, hi, lo = bin.unpack("<iI", data, pos)
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tds_epoch = os.time( {year = 1900, month = 1, day = 1, hour = 00, min = 00, sec = 00, isdst = nil} )
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-- determine the offset between the tds_epoch and the local system epoch
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system_epoch = os.time( os.date("*t", 0))
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tds_offset_seconds = os.difftime(tds_epoch,system_epoch)
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result_seconds = (hi*24*60*60) + (lo/300)
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result = os.date("!%b %d, %Y %H:%M:%S", tds_offset_seconds + result_seconds )
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return pos, result
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end,
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[DataTypes.NTEXTTYPE] = function( data, pos )
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local len, coldata
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-- The first len value is the size of the meta data block
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pos, len = bin.unpack( "<C", data, pos )
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|
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if ( len == 0 ) then
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return pos, 'Null'
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end
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|
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-- Skip over the text update time and date values, we don't need them
|
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-- We may come back add parsing for this information.
|
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pos = pos + len
|
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|
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-- skip a label, should be 'dummyTS'
|
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pos = pos + 8
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|
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-- extract the actual data
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pos, len = bin.unpack( "<I", data, pos )
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pos, coldata = bin.unpack( "A"..len, data, pos )
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return pos, Util.FromWideChar(coldata)
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end,
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[DataTypes.BITNTYPE] = function( data, pos )
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return ColumnData.Parse[DataTypes.SYBINTN](data, pos)
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end,
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[DataTypes.DECIMALNTYPE] = function( precision, scale, data, pos )
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local len, sign, format_string, coldata
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pos, len = bin.unpack("<C", data, pos)
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|
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if ( len == 0 ) then
|
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return pos, 'Null'
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end
|
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|
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pos, sign = bin.unpack("<C", data, pos)
|
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|
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-- subtract 1 from data len to account for sign byte
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len = len - 1
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|
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if ( len == 2 ) then
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pos, coldata = bin.unpack("<S", data, pos)
|
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elseif ( len == 4 ) then
|
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pos, coldata = bin.unpack("<I", data, pos)
|
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elseif ( len == 8 ) then
|
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pos, coldata = bin.unpack("<L", data, pos)
|
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else
|
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stdnse.print_debug("Unhandled length (%d) for DECIMALNTYPE", len)
|
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return pos + len, 'Unsupported Data'
|
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end
|
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|
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if ( sign == 0 ) then
|
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coldata = coldata * -1
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end
|
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|
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coldata = coldata * (10^-scale)
|
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-- format the return information to reduce truncation by lua
|
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format_string = string.format("%%.%if", scale)
|
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coldata = string.format(format_string,coldata)
|
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|
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return pos, coldata
|
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end,
|
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|
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[DataTypes.NUMERICNTYPE] = function( precision, scale, data, pos )
|
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return ColumnData.Parse[DataTypes.DECIMALNTYPE]( precision, scale, data, pos )
|
||||
end,
|
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|
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[DataTypes.SYBDATETIME] = function( data, pos )
|
||||
local hi, lo, result_seconds, result
|
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local tds_epoch, system_epoch, tds_offset_seconds
|
||||
|
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pos, hi, lo = bin.unpack("<iI", data, pos)
|
||||
|
||||
tds_epoch = os.time( {year = 1900, month = 1, day = 1, hour = 00, min = 00, sec = 00, isdst = nil} )
|
||||
-- determine the offset between the tds_epoch and the local system epoch
|
||||
system_epoch = os.time( os.date("*t", 0))
|
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tds_offset_seconds = os.difftime(tds_epoch,system_epoch)
|
||||
|
||||
result_seconds = (hi*24*60*60) + (lo/300)
|
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|
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result = os.date("!%b %d, %Y %H:%M:%S", tds_offset_seconds + result_seconds )
|
||||
return pos, result
|
||||
end,
|
||||
|
||||
[DataTypes.BITNTYPE] = function( data, pos )
|
||||
return ColumnData.Parse[DataTypes.SYBINTN](data, pos)
|
||||
end,
|
||||
|
||||
[DataTypes.NTEXTTYPE] = function( data, pos )
|
||||
local len, coldata
|
||||
|
||||
-- The first len value is the size of the meta data block
|
||||
pos, len = bin.unpack( "<C", data, pos )
|
||||
|
||||
if ( len == 0 ) then
|
||||
return pos, 'Null'
|
||||
end
|
||||
|
||||
-- Skip over the text update time and date values, we don't need them
|
||||
-- We may come back add parsing for this information.
|
||||
pos = pos + len
|
||||
|
||||
-- skip a label, should be 'dummyTS'
|
||||
pos = pos + 8
|
||||
|
||||
-- extract the actual data
|
||||
pos, len = bin.unpack( "<I", data, pos )
|
||||
pos, coldata = bin.unpack( "A"..len, data, pos )
|
||||
|
||||
return pos, Util.FromWideChar(coldata)
|
||||
end,
|
||||
|
||||
[DataTypes.FLTNTYPE] = function( data, pos )
|
||||
local len, coldata
|
||||
pos, len = bin.unpack("<C", data, pos)
|
||||
|
||||
if ( len == 0 ) then
|
||||
return pos, 'Null'
|
||||
elseif ( len == 4 ) then
|
||||
pos, coldata = bin.unpack("f", data, pos)
|
||||
elseif ( len == 8 ) then
|
||||
pos, coldata = bin.unpack("<d", data, pos)
|
||||
end
|
||||
|
||||
return pos, coldata
|
||||
end,
|
||||
|
||||
[DataTypes.MONEYNTYPE] = function( data, pos )
|
||||
local len, value, coldata, hi, lo
|
||||
pos, len = bin.unpack("C", data, pos)
|
||||
|
||||
if ( len == 1 ) then
|
||||
return bin.unpack("C", data, pos)
|
||||
elseif ( len == 2 ) then
|
||||
return bin.unpack("<S", data, pos)
|
||||
if ( len == 0 ) then
|
||||
return pos, 'Null'
|
||||
elseif ( len == 4 ) then
|
||||
return bin.unpack("<I", data, pos)
|
||||
--type smallmoney
|
||||
pos, value = bin.unpack("<i", data, pos)
|
||||
elseif ( len == 8 ) then
|
||||
return bin.unpack("<L", data, pos)
|
||||
-- type money
|
||||
pos, hi,lo = bin.unpack("<II", data, pos)
|
||||
value = ( hi * 4294967296 ) + lo
|
||||
else
|
||||
return -1, ("Unhandled length (%d) for SYBINTN"):format(len)
|
||||
return -1, ("Unhandled length (%d) for MONEYNTYPE"):format(len)
|
||||
end
|
||||
|
||||
-- the datatype allows for 4 decimal places after the period to support various currency types.
|
||||
-- forcing to string to avoid truncation
|
||||
coldata = string.format("%.4f",value/10000)
|
||||
|
||||
return pos, coldata
|
||||
end,
|
||||
|
||||
[DataTypes.SYBDATETIMN] = function( data, pos )
|
||||
local len, coldata
|
||||
|
||||
pos, len = bin.unpack( "<C", data, pos )
|
||||
|
||||
if ( len == 0 ) then
|
||||
return pos, 'Null'
|
||||
elseif ( len == 4 ) then
|
||||
-- format is smalldatetime
|
||||
local days, mins
|
||||
pos, days, mins = bin.unpack("<SS", data, pos)
|
||||
|
||||
tds_epoch = os.time( {year = 1900, month = 1, day = 1, hour = 00, min = 00, sec = 00, isdst = nil} )
|
||||
-- determine the offset between the tds_epoch and the local system epoch
|
||||
system_epoch = os.time( os.date("*t", 0))
|
||||
tds_offset_seconds = os.difftime(tds_epoch,system_epoch)
|
||||
|
||||
result_seconds = (days*24*60*60) + (mins*60)
|
||||
coldata = os.date("!%b %d, %Y %H:%M:%S", tds_offset_seconds + result_seconds )
|
||||
|
||||
return pos,coldata
|
||||
|
||||
elseif ( len == 8 ) then
|
||||
-- format is datetime
|
||||
return ColumnData.Parse[DataTypes.SYBDATETIME](data, pos)
|
||||
else
|
||||
return -1, ("Unhandled length (%d) for SYBDATETIMN"):format(len)
|
||||
end
|
||||
|
||||
end,
|
||||
|
||||
[DataTypes.XSYBVARBINARY] = function( data, pos )
|
||||
local len, coldata
|
||||
|
||||
pos, len = bin.unpack( "<S", data, pos )
|
||||
|
||||
if ( len == 65535 ) then
|
||||
return pos, 'Null'
|
||||
else
|
||||
pos, coldata = bin.unpack( "A"..len, data, pos )
|
||||
return pos, "0x" .. select(2, bin.unpack("H"..coldata:len(), coldata ) )
|
||||
end
|
||||
|
||||
return -1, "Error"
|
||||
end,
|
||||
|
||||
[DataTypes.SYBDATETIME] = function( data, pos )
|
||||
local hi, lo, dt, result
|
||||
pos, hi, lo = bin.unpack("<II", data, pos)
|
||||
[DataTypes.XSYBVARCHAR] = function( data, pos )
|
||||
local len, coldata
|
||||
|
||||
-- CET 01/01/1900
|
||||
dt = -2208996000
|
||||
result = os.date("%x %X", dt + (hi*24*60*60) + (lo/300) )
|
||||
pos, len = bin.unpack( "<S", data, pos )
|
||||
if ( len == 65535 ) then
|
||||
return pos, 'Null'
|
||||
end
|
||||
|
||||
return pos, result
|
||||
pos, coldata = bin.unpack( "A"..len, data, pos )
|
||||
|
||||
return pos, coldata
|
||||
end,
|
||||
|
||||
[DataTypes.SYBDATETIMN] = function( data, pos )
|
||||
return ColumnData.Parse[DataTypes.SYBINTN]( data, pos )
|
||||
[DataTypes.BIGBINARYTYPE] = function( data, pos )
|
||||
return ColumnData.Parse[DataTypes.XSYBVARBINARY](data, pos)
|
||||
end,
|
||||
|
||||
[DataTypes.BIGCHARTYPE] = function( data, pos )
|
||||
return ColumnData.Parse[DataTypes.XSYBVARCHAR](data, pos)
|
||||
end,
|
||||
|
||||
[DataTypes.XSYBNVARCHAR] = function( data, pos )
|
||||
local len, coldata
|
||||
|
||||
pos, len = bin.unpack( "<S", data, pos )
|
||||
if ( len == 65535 ) then
|
||||
return pos, 'Null'
|
||||
end
|
||||
pos, coldata = bin.unpack( "A"..len, data, pos )
|
||||
|
||||
return pos, Util.FromWideChar(coldata)
|
||||
end,
|
||||
|
||||
[DataTypes.SQLNCHAR] = function( data, pos )
|
||||
return ColumnData.Parse[DataTypes.XSYBNVARCHAR](data, pos)
|
||||
end,
|
||||
|
||||
}
|
||||
@@ -968,6 +1322,21 @@ Token =
|
||||
return pos, token
|
||||
end,
|
||||
|
||||
--- Parses a DoneProc token recieved after executing a SP
|
||||
--
|
||||
-- @param data string containing "raw" data
|
||||
-- @param pos number containing offset into data
|
||||
-- @return pos number containing new offset after parse
|
||||
-- @return token table containing token specific fields
|
||||
[TokenType.DoneProc] = function( data, pos )
|
||||
local token
|
||||
pos, token = Token.Parse[TokenType.Done]( data, pos )
|
||||
token.type = TokenType.DoneProc
|
||||
|
||||
return pos, token
|
||||
end,
|
||||
|
||||
|
||||
--- Parses a DoneInProc token recieved after executing a SP
|
||||
--
|
||||
-- @param data string containing "raw" data
|
||||
@@ -1035,7 +1404,6 @@ Token =
|
||||
end
|
||||
|
||||
pos, colinfo = ColumnInfo.Parse[ttype]( data, pos )
|
||||
|
||||
colinfo.usertype = usertype
|
||||
colinfo.flags = flags
|
||||
colinfo.type = ttype
|
||||
@@ -2423,7 +2791,13 @@ Helper =
|
||||
local val
|
||||
|
||||
if ( ColumnData.Parse[colinfo[i].type] ) then
|
||||
if not ( colinfo[i].type == 106 or colinfo[i].type == 108) then
|
||||
pos, val = ColumnData.Parse[colinfo[i].type](data, pos)
|
||||
else
|
||||
-- decimal / numeric types need precision and scale passed.
|
||||
pos, val = ColumnData.Parse[colinfo[i].type]( colinfo[i].precision, colinfo[i].scale, data, pos)
|
||||
end
|
||||
|
||||
if ( -1 == pos ) then
|
||||
return false, val
|
||||
end
|
||||
|
||||
Reference in New Issue
Block a user